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49 lines
1.0 KiB
C
49 lines
1.0 KiB
C
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// -*- C++ -*-
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/**
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* \file render_base.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Angus Leeming
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef RENDER_BASE_H
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#define RENDER_BASE_H
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#include "dimension.h"
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#include <boost/weak_ptr.hpp>
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class BufferView;
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class MetricsInfo;
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class PainterInfo;
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class RenderBase {
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public:
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virtual ~RenderBase() {}
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virtual RenderBase * clone() const = 0;
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/// compute the size of the object returned in dim
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virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0;
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/// draw inset and update (xo, yo)-cache
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virtual void draw(PainterInfo & pi, int x, int y) const = 0;
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/// An accessor function to the cached store.
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BufferView * view() const;
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protected:
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RenderBase() {}
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RenderBase(RenderBase const &) {}
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void operator=(RenderBase const &) {}
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/// These are cached variables (are not copied).
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mutable boost::weak_ptr<BufferView> view_;
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mutable Dimension dim_;
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};
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#endif // NOT RENDER_BASE_H
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